Hi,I want to use an Atmega to read the position of a potentiometer via USB.

What is the smallest Atmega I can use for this task?

Annotation: I know it is possible using one atmega8(with integrated rs232) in conjunction withone FTDI(usb2serialConverter) but because there are 2 chips instead of onethe current consumption is double. So I want to use ONE chip only if it's possible.